World
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60
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East Asia
[]
|
2
|
Europe
[]
|
15
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North America
|
40
|
Canada
[]
|
3
|
[]
|
United States
[]
|
39
|
[]
|
North Asia
[]
|
1
|
South America
[]
|
1
|
Southeast Asia
[]
|
2
|
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Studies with no locations are not included in the counts or on the map.
Studies with multiple locations are included in each region containing locations.
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